NYPD’s Hate Crimes unit is investigating after a man allegedly declared he would attack the first white person he came across, then punched and knocked out a 69-year-old man in Union Square Wednesday.

LaShawn Marten, 31, of Morningside Heights, is accused of attacking three people in the busy plaza Wednesday afternoon, according to the NYPD. Police said the suspect, who is black, punched the 69-year-old white man in the face, causing serious injuries. The suspect then punched a 48-year-old person and an 18-year-old person, both also white.

The suspect “made statements to the effect that ‘I’m going to punch the first white man that I see,” Police Commissioner Ray Kelly said.